CN1015566B - Electromagnetic clutch having high torque transfer - Google Patents

Electromagnetic clutch having high torque transfer

Info

Publication number
CN1015566B
CN1015566B CN87106217A CN87106217A CN1015566B CN 1015566 B CN1015566 B CN 1015566B CN 87106217 A CN87106217 A CN 87106217A CN 87106217 A CN87106217 A CN 87106217A CN 1015566 B CN1015566 B CN 1015566B
Authority
CN
China
Prior art keywords
magnetic
circular groove
rotary member
end plate
axial end
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CN87106217A
Other languages
Chinese (zh)
Other versions
CN87106217A (en
Inventor
松下孝
植原文明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanden Corp
Original Assignee
Sanden Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP13559686U external-priority patent/JPS6345429U/ja
Priority claimed from JP13559586U external-priority patent/JPS6342936U/ja
Application filed by Sanden Corp filed Critical Sanden Corp
Publication of CN87106217A publication Critical patent/CN87106217A/en
Publication of CN1015566B publication Critical patent/CN1015566B/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
    • F16D27/10—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings
    • F16D27/108—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members
    • F16D27/112—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
    • F16D27/10—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
    • F16D2027/008—Details relating to the magnetic circuit, or to the shape of the clutch parts to achieve a certain magnetic path

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Operated Clutches (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

An electromagnetic clutch is disclosed which includes a first rotatable member rotatably supported on a first bearing. The first rotatable member further has a magnetic axial end plate. The magnetic axial end plate has at least one arcuate slit. A second rotatable member is rotatably supported on a second bearing. An annular magnetic member is supported on the second rotatable member so as to be capable of limited axial movement and faces the axial end plate of the first rotatable member with an axial gap therebetween. An electromagnet is associated with one of the rotatable members and the annular magnetic member for attracting the other of the rotatable members and the annular magnetic member. At least one of either the axial end plate or the annular magnetic member has an annular groove.

Description

Electromagnetic clutch having high torque transfer
Generally speaking, the invention relates to magnetic clutch, in more detail, be about for the torque transfer capability that improves magnetic clutch to improvement that clutch rotor and armature card carried out.
Magnetic clutch is well-known in prior art, its suitable control power transmission from motor car engine to the automotive air-conditioning system refrigerant compressor.The general structure of automotive air-conditioning system magnetic clutch is at existing U. S. Patent 3,044,594 and 3,082, introduction arranged in No. 933.
Referring to Fig. 1.This is the schematic representation of common electrical magnet clutch structure.Clutch device system is configured in the outer periphery part of the annular tube shaped extension 2 of protruding compressor case 1 end face around transmission shaft 3.Transmission shaft 3 by bearing 4 rotatably supports at compressor case 1.Clutch device is equipped with a rotor 5, and it is installed on the atubular extension part 2 by bearing 6, and is driven by the motor car engine (not shown) by the belt (not shown).Rotor 5 is equipped with a plurality of concentric arc incision 5a, 5b, forms magnetic pole strength 5c on its axial end.Lining 7 is fixed on the end, outer end of live axle 3, and 3 of live axles stretch out from atubular extension part 2.Armature card 8 by 9 flexible connections of a plurality of springs to lining 7, one end of reed 9 then mat rivet 11 is fixed to the outer surface of armature card 8 in such a way, promptly make axial end surface towards the magnetic pole strength 5c of rotor 5, between forms the axial air-gap G of predetermined width.The axial end surface of armature card 8 is provided with concentric arcs otch 8a in the position of the intermediate portion of facing the two interface 5a, the 5b that form on the magnetic pole strength 5c, to form magnetic pole strength 8b.Electromagnet 10 is installed on the compressor case 1 with one heart with live axle 3.Electromagnet 10 has an electromagnetic coil 101, is configured among the annular hollow parts 5d that forms in the rotor 5, and air gap is arranged on every side.When the electromagnetic coil 101 of electromagnet 10 was switched on, magnetic pole strength 8b was attracted to magnetic pole strength 5c.So when motor drove rotor 5 rotations, live axle 3 was just turned over.On the other hand, during electromagnetic coil 101 no electric circuits of electromagnetic wire iron 10, the magnetic pole strength 8b of armature card 8 separates because of the rebounding force of the sheet spring 9 magnetic pole strength 5c with rotor 5.Like this, rotor 5 just can rotate according to the output of motor, but transmission shaft 3 is not driven.
In the said structure of magnetic clutch, the magnetic flux M that is produced around electromagnet 10 during electromagnetic coil 101 energisings forms magnetic circuit by electromagnet 10, rotor 5 and armature card 8.Specifically, because magnetic flux M has the tendency of getting the shortest path circulation usually in magnetic circuit, if magnetic flux M presses the shortest path circulation in magnetic circuit, friction torque is compared with magnetic flux density and is just seemed less, therefore magnetic flux M flows to the periphery of the magnetic pole strength 8b intermediate portion of the armature card 8 that adjoins rivet 11 earlier from the magnetic pole strength 5c of rotor 5, form tortuous magnetic circuit by rotor 5 and armature card 8 again, shown in the dotted arrow among Fig. 1.
It is high but do not increase the magnetic clutch of power consumption that main purpose of the present invention provides a kind of torque transfer capability.
Another object of the present invention provides little but the magnetic clutch that therefore torque transfer capability does not reduce of a kind of volume.
Magnetic clutch of the present invention has first rotary member that is rotatably supported on the clutch shaft bearing.First rotary member is connected to an external drive source.First rotary member has an axial end plate of magnetic.Form at least one arc incision of locating with one heart on the axial end plate of magnetic with the axis of compressor.Second rotary member is rotatably supported on second bearing.An annular magnet member supporting makes magnetic component can do limited axial motion on second rotary member, and faces the axial end plate of first rotary member, forms axial clearance between the two.At least form an arc incision on the annular magnet member.In electromagnet and rotary member and the annular magnet member one is approaching, in order to attract another rotary member.Axially respectively have a circular groove in end plate and the annular magnet member, take a shorter way at its axial end in order to prevent magnetic flux.
Magnetic clutch volume of the present invention is little, the torque transfer capability height, and power consumption is low, and circular groove need not to change area S, magnetic flux M and friction factor U increases friction torque T by forming.
Can understand other purpose of the present invention, characteristics and other situation about the detailed introduction of all most preferred embodiments of the present invention below reading with reference to accompanying drawing.
Fig. 1 is the sectional view of general magnetic clutch.
Fig. 2 is the sectional view of the magnetic clutch of one embodiment of the invention.
Fig. 3 is only with the sectional view of Fig. 2 rotor structure through the magnetic clutch after improving.
Fig. 4 is the sectional view of the magnetic clutch of another embodiment of the present invention.
Fig. 5 is the enlarged view of circle A among Fig. 4.
Referring to Fig. 2.This is the structural representation of the magnetic clutch of one embodiment of the invention.The structure of this magnetic clutch identical with shown in Fig. 1.Therefore each member and the parts identical with Fig. 1 all adopt same Ref. No., for the purpose of simplified illustration, repeat no more here.
Circular groove 20 is to form on the magnetic pole strength 5c of rotor 5.In this embodiment, the outer periphery surface of rotor 5 is provided with a plurality of U-groove bevels.Not so also can adopt list or dual U-shaped groove, as shown in Figure 3.The interior edge of circular groove 20 is adjacent with concentric arcs otch 5a, and the outer periphery surface of circular groove 20 then extends to the outer periphery surface near magnetic pole strength 5C.Circular groove 21 forms on the magnetic pole strength 8b of armature card 8, is located at and circular groove 20 corresponding positions.
When electromagnetic coil 101 energising of electromagnet 10, there is magnetic flux M to produce, magnetic flux M flow through electromagnet 10, rotor 5 and armature card 8 formed magnetic circuits are shown in the dotted arrow among Fig. 2.So the magnetic pole strength 8b of armature card 8 attracted on the magnetic pole strength 5c of rotor 5.
In the flow process of magnetic flux M, magnetic flux M flows into the outer periphery surface of the magnetic pole strength 8b of armature card 8 then from the magnetic pole strength 5c of rotor 5.In this case, on two magnetic pole strength 5c, 8b, form circular groove 20,21, thereby avoid magnetic flux M to take a shorter way.
Usually, when magnetic flux when two flow between the surface relatively, the attraction force P between the surface can be determined by following formula:
P＝4.06×10 4×M 2/S
S is apparent surface's a area in the formula, and M is a magnetic flux.
The friction torque T that is produced between two magnetic pole strength 5c and 8b when in addition, magnetic pole strength 8b sticking is to magnetic pole strength 5c can be determined by following formula:
T＝P×U×r
P is an attraction force in the formula, and U is a friction factor, and r is the mean value of annular friction surface effective radius.
Therefore to increase friction torque T and attraction force P and friction factor u just should get bigger effective radius mean value when constant.That is, effective radius mean value increases, and friction torque T increases.
In addition, if the outer ring radius is rs, interior annular radius is rt, and then effective radius mean value can be determined by following formula:
r＝ 2/3 ((rs 3-rt 3))/((rs 2-rt 2))
When circular groove forms on each magnetic pole strength respectively, as shown in Figure 2, can suppose that outer ring radius r s is the outer ring radius r 1 of rotor 5, interior annular radius rt is the outer ring radius r 2 of circular groove.Annular friction surface (settling more outerly than concentric arcs otch 5a) effective radius mean value ra can determine with following formula:
ra＝ 2/3 ((rl 3-rl 3))/((rl 2-rl 2))
On the other hand, when circular groove is not (as shown in Figure 1) when forming respectively, can suppose that outer ring radius r s is the outer ring radius r 1 of rotor 5 on magnetic pole strength, interior annular radius rt is the outer ring radius r 3 of concentric arcs otch 5a.Annular friction surface effective radius mean value rb can be determined by following formula:
rb＝ 2/3 ((rl 3-r3 3))/((rl 2-r3 2))
In view of the outer ring radius r 2 of circular groove usually greater than the outer ring radius r 3(r2 of concentric arcs otch 5a＞r3), thereby effective radius mean value ra is always greater than effective radius mean value ra.Therefore can circular groove need not to change area S, magnetic flux M and friction factor U increases friction torque T by forming.
The purpose that forms a circular groove on all friction surfaces respectively is to increase magnetic resistance and force magnetic flux flow through the little outside magnetic circuit of magnetic resistance.Therefore, be preferably in both sides and form two circular grooves.Even but only form a circular groove on a friction surface therein, as long as the degree of depth of groove is enough to prevent that magnetic flux from taking a shorter way, also can produce and above-mentioned same effect.
Referring to Fig. 4,5.This is the structural drawing of the magnetic clutch of another embodiment of the present invention.Friction member 22 is made by nonmagnetic substance, and it is configured in the circular groove 21 that armature card 8 magnetic pole strength 8b form.Nonmagnetic substance can be made by (for example) fiber stuff, asbestos and phenolic resin etc.Rotor 5 is that cutting forms towards the magnetic pole strength 5c of armature card 8, makes that the surface of magnetic pole strength 5c is slick and sly, as shown in Figure 5.Therefore because the effect of friction member 22 makes rotor 5 engage more firmly with armature card 8.At this moment, the magnetic pole strength 5c of rotor 5 repairs it to such an extent that have slick and sly surface by cutting, thereby avoids friction member 22 wearing and tearing.

Claims (1)

1, a kind of magnetic clutch, it comprises first rotary member that is rotatably supported on the clutch shaft bearing, and described first rotary member has the axial end plate of a magnetic, and the axial end plate of described magnetic has at least one arc opening; Second rotary member of a rotatable support on one second bearing, the described second rotary member upper support has an annular magnet member, described annular magnet member can be done limited axial motion, described annular magnet member has axial clearance between the two in the face of the axial end plate of described magnetic of described first rotary member; And with the approaching calutron of described first rotary member, in order to attract to be bearing in the described annular magnet member on described second rotary member; It is characterized in that also having in this clutch
Article one, be formed on first circular groove on the axial end plate of described magnetic, the outer of described first circular groove is in abutting connection with the outer surface of described first rotary member, and the interior edge of described first circular groove is in abutting connection with described at least one arc opening; And
Article one, be formed on second circular groove on the described annular magnet member relative with described first circular groove.
CN87106217A 1986-09-05 1987-09-05 Electromagnetic clutch having high torque transfer Expired CN1015566B (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP13559686U JPS6345429U (en) 1986-09-05 1986-09-05
JP13559586U JPS6342936U (en) 1986-09-05 1986-09-05
JP135.596/86 1986-09-05
JP135.595/86 1986-09-05

Publications (2)

Publication Number Publication Date
CN87106217A CN87106217A (en) 1988-04-27
CN1015566B true CN1015566B (en) 1992-02-19

Family

ID=26469412

Family Applications (1)

Application Number Title Priority Date Filing Date
CN87106217A Expired CN1015566B (en) 1986-09-05 1987-09-05 Electromagnetic clutch having high torque transfer

Country Status (7)

Country Link
US (1) US4892176A (en)
KR (1) KR940001989B1 (en)
CN (1) CN1015566B (en)
AU (1) AU601209B2 (en)
CA (1) CA1305675C (en)
GB (1) GB2194823B (en)
MY (1) MY102354A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0312624U (en) * 1989-06-22 1991-02-08
JPH0357526U (en) * 1989-10-12 1991-06-03
JP2001200861A (en) 2000-01-14 2001-07-27 Mitsubishi Heavy Ind Ltd Electromagnetic clutch
JP2004052985A (en) * 2002-07-24 2004-02-19 Zexel Valeo Climate Control Corp Electromagnetic clutch
DE602004019499D1 (en) * 2003-03-07 2009-04-02 Nok Corp ELECTROMAGNETIC CLUTCH
JP4789539B2 (en) * 2005-08-05 2011-10-12 アイシン精機株式会社 Drive device
DE202008011202U1 (en) * 2008-08-22 2009-01-29 Kendrion Linnig Gmbh Reibschaltkupplung with one of a drive motor via a drive belt driven drive wheel and drive unit

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162285A (en) * 1959-05-28 1964-12-22 Eaton Mfg Co Electro-magnetic clutch with molded coil unit
GB966750A (en) * 1960-08-24 1964-08-12 Alec Norman Clark Improvements in or relating to electro-magnetic clutches
DE1170723B (en) * 1961-06-13 1964-05-21 Pintsch Bamag Ag Electromagnetically operated friction clutch or brake
GB960074A (en) * 1961-10-17 1964-06-10 Stromag Maschf Improvements in or relating to clutches and brakes
US3384213A (en) * 1966-01-13 1968-05-21 Gen Motors Corp Electromagnetic clutch with carbon core
US3530416A (en) * 1968-12-13 1970-09-22 Warner Electric Brake & Clutch Magnetic element for stationary field clutches
DE1964311A1 (en) * 1969-12-23 1971-07-01 Zahnradfabrik Friedrichshafen Electromagnetically actuated friction clutch
US3842378A (en) * 1973-07-20 1974-10-15 Pitts Ind Inc Double clutch for vehicle air conditioning compressor
DE2538494C3 (en) * 1975-08-29 1981-01-08 Schultz, Wolfgang E., Dipl.-Ing., 8940 Memmingen Electromagnetically actuated friction disc clutch or brake
DE2638944A1 (en) * 1976-08-28 1978-03-02 Zahnradfabrik Friedrichshafen MAGNETIC ACTUATED FRICTION CLUTCH OR BRAKE
US4227600A (en) * 1977-10-18 1980-10-14 Sankyo Electric Company Limited Electromagnetic clutches
JPS5810605B2 (en) * 1978-03-27 1983-02-26 株式会社日立製作所 Electromagnetic clutch and its manufacturing method
US4190141A (en) * 1978-06-05 1980-02-26 General Motors Corporation Electromagnetic clutch
US4632236A (en) * 1982-11-10 1986-12-30 Sanden Corporation Electromagnetic clutch having high torque transfer
US4567975A (en) * 1984-02-17 1986-02-04 Warner Electric Brake & Clutch Co. Apparatus and method for controlling the engagement of a gap-type electromagnetic coupling and for alleviating engagement noise
JPS6246029A (en) * 1985-08-23 1987-02-27 Sanden Corp Electromagnetic clutch
EP0215962A1 (en) * 1985-09-07 1987-04-01 K. Ernst Brinkmann Industrieverwaltung Electromagnetically engaged or disengaged clutch or brake

Also Published As

Publication number Publication date
CA1305675C (en) 1992-07-28
KR880004246A (en) 1988-06-07
US4892176A (en) 1990-01-09
AU601209B2 (en) 1990-09-06
AU7796887A (en) 1988-03-17
GB8720791D0 (en) 1987-10-14
GB2194823B (en) 1991-01-02
GB2194823A (en) 1988-03-16
MY102354A (en) 1992-06-17
KR940001989B1 (en) 1994-03-12
CN87106217A (en) 1988-04-27

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